整理笔记的代码 - 黑马程序员技术交流社区

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
public class Notes {
private static String s2 = "G:\\黑马视频\\io笔记2.txt";
public static void main(String[] args) {
String dirpath = "F:\\workspace\\day28\\src\\IObij\\a";
listDe(dirpath);
}
public static void Copy(String s1,String s2){
FileWriter fw = null;
FileReader fr = null;
try{
String fuhao = "\r\n=================================================================================\r\n";
fw = new FileWriter(s2,true);
fr = new FileReader(s1);
char [] buf = new char[1024];
int len = 0;
while ((len=fr.read(buf))!=-1){
fw.write(buf,0,len);
}
fw.write(fuhao);
}catch(IOException e ){
throw new RuntimeException("读写失败！");
}finally{
if(fr!=null)
try{
//fr.flush();
fr.close();
}catch(IOException e){
e.printStackTrace();
}
if(fw!=null)
try{
fw.close();
}catch(IOException e)
{
e.printStackTrace();
}
}
}
public static void listDe(String dirpath){
File dir = new File(dirpath);
String[] s = dir.list(new FilenameFilter(){
public boolean accept(File dir ,String name){
//文件名过滤；
return name.endsWith(".java");
}
});
for (String n:s){
// System.out.println(dirpath+"\\"+n);
Copy(dirpath+"\\"+n,s2);
// System.out.println("=================================================================================");
}
}
}

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